Ruth, it sounds like Miss Lucy is acting out, much like a child does when something has happened in their life to upset them. Maybe a visit to a doggie shrink???
Our Roxy will eat inedibles, too. Pinecones, gardenhoses, wool, ficus trees, the attachments that go on garden hoses, garbage cans, Q-Tips, shoes, cell phone chargers, electrical cords...you name it and Rox--In-The-Head has probably eaten it or at least attempted to.
She's gotten better now that I've taken over her care. DD just wasn't paying enough attention to her. Now, she gets lots of love, time on the bed with me and dh and her own chair to sleep in at night. She's not nearly as bad as she was...but I still don't leave her near anything I value.
Oh, yeah, a couple weeks ago, she found a bag of apples...tasted every single one of them...